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Article from Details magazine – In a nutshell, the fitness industry is finally catching up with CrossFit and many other popular ways that athletes train; High intensity interval training. It promotes fat loss, where longer, less intense workouts in the “fat burning” zone discourage fat loss. The reason is due to both to constantly keeping the body guessing during a workout and the after-burn effect of the interval training. Read more here: http://tinyurl.com/3ldwyw7